110 lines
2.8 KiB
C++
110 lines
2.8 KiB
C++
// Copyright 2009 The RE2 Authors. All Rights Reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#ifndef UTIL_LOGGING_H_
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#define UTIL_LOGGING_H_
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// Simplified version of Google's logging.
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ostream>
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#include <sstream>
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#include "util/util.h"
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// Debug-only checking.
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#define DCHECK(condition) assert(condition)
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#define DCHECK_EQ(val1, val2) assert((val1) == (val2))
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#define DCHECK_NE(val1, val2) assert((val1) != (val2))
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#define DCHECK_LE(val1, val2) assert((val1) <= (val2))
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#define DCHECK_LT(val1, val2) assert((val1) < (val2))
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#define DCHECK_GE(val1, val2) assert((val1) >= (val2))
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#define DCHECK_GT(val1, val2) assert((val1) > (val2))
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// Always-on checking
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#define CHECK(x) if(x){}else LogMessageFatal(__FILE__, __LINE__).stream() << "Check failed: " #x
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#define CHECK_LT(x, y) CHECK((x) < (y))
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#define CHECK_GT(x, y) CHECK((x) > (y))
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#define CHECK_LE(x, y) CHECK((x) <= (y))
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#define CHECK_GE(x, y) CHECK((x) >= (y))
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#define CHECK_EQ(x, y) CHECK((x) == (y))
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#define CHECK_NE(x, y) CHECK((x) != (y))
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#define LOG_INFO LogMessage(__FILE__, __LINE__)
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#define LOG_WARNING LogMessage(__FILE__, __LINE__)
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#define LOG_ERROR LogMessage(__FILE__, __LINE__)
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#define LOG_FATAL LogMessageFatal(__FILE__, __LINE__)
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#define LOG_QFATAL LOG_FATAL
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// It seems that one of the Windows header files defines ERROR as 0.
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#ifdef _WIN32
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#define LOG_0 LOG_INFO
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#endif
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#ifdef NDEBUG
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#define LOG_DFATAL LOG_ERROR
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#else
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#define LOG_DFATAL LOG_FATAL
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#endif
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#define LOG(severity) LOG_ ## severity.stream()
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#define VLOG(x) if((x)>0){}else LOG_INFO.stream()
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class LogMessage {
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public:
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LogMessage(const char* file, int line)
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: flushed_(false) {
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stream() << file << ":" << line << ": ";
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}
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void Flush() {
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stream() << "\n";
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std::string s = str_.str();
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size_t n = s.size();
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if (fwrite(s.data(), 1, n, stderr) < n) {} // shut up gcc
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flushed_ = true;
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}
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~LogMessage() {
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if (!flushed_) {
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Flush();
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}
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}
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std::ostream& stream() { return str_; }
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private:
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bool flushed_;
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std::ostringstream str_;
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LogMessage(const LogMessage&) = delete;
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LogMessage& operator=(const LogMessage&) = delete;
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};
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// Silence "destructor never returns" warning for ~LogMessageFatal().
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// Since this is a header file, push and then pop to limit the scope.
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable: 4722)
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#endif
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class LogMessageFatal : public LogMessage {
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public:
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LogMessageFatal(const char* file, int line)
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: LogMessage(file, line) {}
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ATTRIBUTE_NORETURN ~LogMessageFatal() {
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Flush();
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abort();
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}
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private:
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LogMessageFatal(const LogMessageFatal&) = delete;
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LogMessageFatal& operator=(const LogMessageFatal&) = delete;
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};
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#endif // UTIL_LOGGING_H_
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